Windows Mac

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Create and publish various diagrams to represent your idea.

View, sign, annotate, and print PDF files on your Mac.

Organizes and reminds you about important events in your life.

Organize your life and keep track of what you've done and what you have to do.

Momentum is a powerful habit tracker that boosts willpower and helps you reach your goals.

Find out how millions of users worldwide have revolutionized the way they think.

Windows

Windows Mac

Siver Sofware

Free

Interactive Rubik's puzzle. There are almost no rules.